//  -----------------------------------------------------------------------------------------------//
//   This file is part of SvnExternalUpdater                                                               //
//   Copyright (C)2008 Romain Verdier ( romain@codingly.com )                                      //
//                                                                                                 //
//   This program is free software; you can redistribute it and/or modify it under the terms       //
//   of the GNU General Public License as published by the Free Software Foundation; either        //
//   version 2 of the License, or (at your option) any later version. This program is distributed  //
//   in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied        //
//   warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public  //
//   License for more details.                                                                     //
//                                                                                                 //
//   You should have received a copy of the GNU General Public License along with this program; if //
//   not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. or  //
//   see http://www.fsf.org/licensing/licenses/gpl.html                                            //
//  -----------------------------------------------------------------------------------------------//
using System;
using System.Text.RegularExpressions;

namespace Codingly.SvnExternalUpdater.Core
{
	public static class ExternalTypeRegex
	{
		public const string FolderGroup = "FOLDER";
		public static readonly string RevisionGroup = "REVISION";
		public static readonly string UrlGroup = "URL";

		public static Regex GetRegex(ExternalType type)
		{
			string pattern;
			switch (type)
			{
				case ExternalType.RevisionFirst:
					pattern = string.Format(@"^\s*-r\s*(?<{0}>\d*)\s+(?<{1}>.*)\s+(?<{2}>.*)$", RevisionGroup, UrlGroup, FolderGroup);
					break;
				case ExternalType.UrlFirstWithRevision:
					pattern = string.Format(@"^\s*(?<{0}>.*)@(?<{1}>\d*)\s+(?<{2}>.*)$", UrlGroup, RevisionGroup, FolderGroup);
					break;
				case ExternalType.UrlFirst:
					pattern = string.Format(@"^\s*(?<{0}>(?:\w*:\/\/.*)|(?:\.\.\/.*)|(?:\^\/.*)|(?:\/\/.*)|(?:\/.*))\s(?<{1}>.*\s*)$", UrlGroup, FolderGroup);
					break;
				case ExternalType.FolderFirst:
					pattern = string.Format(@"^\s*(?<{0}>.*)\s-r\s*(?<{1}>\d*)\s*(?<{2}>.*)$", FolderGroup, RevisionGroup, UrlGroup);
					break;
				case ExternalType.FolderFirstWithoutRevision:
					pattern = string.Format(@"^\s*(?<{0}>[\w_][\w\-\.\/_]*)\s+(?<{1}>(?:\w*:\/\/.*)|(?:\.\.\/.*)|(?:\^\/.*)|(?:\/\/.*)|(?:\/.*))$", FolderGroup, UrlGroup);
					break;
				default:
					throw new ArgumentOutOfRangeException("type");
			}
			return new Regex(pattern, RegexOptions.ExplicitCapture);
		}
	}
}